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Actuator (Figure 2.3-3): Provides automatic and man-
ual means of fire suppression system actuation. By
pulling the ring pin under the knob and then depressing
the red knob, the puncture pin will rupture the dia-
phragm in the actuator and apply the system. Automat-
ically, the squib is fixed to rupture the cartridge disc
when the linear detection wire is exposed to tempera-
tures in excess of its rated range.
FIGURE 2.3-3. MANUAL/AUTOMATIC ACTUATOR
Linear Detection Wire (Figure 2.3-4): Consists of a
two conductor heat rated thermo cable. The tempera-
ture rating of the cable is 221°F 105°C) black wire or
356°F (180°C) using red wire. When the cable is sub-
jected to temperatures in excess of this rating the
insulating coating melts allowing the conductors to
short together, closing the actuating circuit to fire the
squib.
FIGURE 2.3-4. LINEAR DETECTION WIRE
Power Wire (Figure 2.3-5): Consists of a battery con-
nector and conductor lead wires to connect the actua-
tion system to the truck electrical system (battery
circuit). The battery connector is equipped with a 5
ampere in line fuse (replaceable).
M2.3-2
Ansul "Checkfire" Electric Detection and Actuation System
FIGURE 2.3-5. POWER WIRE
FIGURE 2.3-6. TEST KIT
1. Indicator Light Assembly
2. End-of-Line Detection Wire Jumper Assembly
Test Kit (Figure 2.3-6): Provides for checking of elec-
trical continuity and consists of an indicator light as-
sembly and an End-of-Line linear detection wire jumper
assembly.
FIGURE 2.3-7. SQUIB
Squib (Figure 2.3-7): Is an electrically detonated com-
ponent containing a small exact charge of powder.
When the actuation circuit is closed by the linear de-
tection wire melting, an internal wiring bridge in the
squib heats up causing the power charge to detonate,
forcing the puncture pin to rupture the cartridge disc
to release the nitrogen gas charge.
M02003
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